Self-cleaning fluid filter



Jan. 26, 1954 c. M. TURSKY 2,667,272

SELF-CLEANING FLUID FILTER Filed Sept. 7, 1950 I k 25 29 V i 34'INVENTOR CHARLES M. TURSKY I ATTO R N EIY Patented Jan. 26, 1954SELF-CLEANZING FLUID FILTER.

This invention relates to filters for use in filtering=fiuidsofyariousitypes and kinds. More pare ticularly; the. invention deals.with a device. of this kind adapted foriuse .imfiltering fueLandlubricants as. appliedto various types and .kinds of ap.- paratuswstillimore. particularly, the. invention dealswith a filter devicehaving means for in.- termittently moving: filter cylinders into 1clean-'- ing position for removing sediment and. foreign mattercollected l thereon land to restore such cleaninglfiltersior fuiitherfiltering useby movement -intofiltering position in thedevice. WThe-novel; featuresot the invention will be best e understood from the-i'ollowing' description, when taken together 1 with the accompanyingdrawingyin whichmertainembodiments of the invention are disclosed and; nwhich the sep arateparts are designated by Suitable reference charactersineach'0'f"the views and; in which:

Fig-.5 1 is asecnmiei vi'ew through} one pair of filter cylindersfoffilter devicejniade'aocording t y nventi n; Te Qv'vin'etfie ee i i fi fir r s position; and .si i reg meii e il ust at pa t o the QQ tF 9I diWih Pert l, m -i F g 21 eviewe mile' e-r 1 ekeni area n les o, Fig-ll) ansome. n rhatt 9f e construction and indicating the cylinders self n ne otisp- Fig 3 is an end View ofthe device as seen in -1 I "Fig. 4 is asectional view through one of the filter elements whichl employpand 3Fig.5 is an enlarged diagrammatic view of a part ofthel face ofalfiilterjlelen ent illustrating the Structurithreof, In Fig. 1' r theidrawing; I haveshown' at it the casing oi the' filter and at H and 12.the end plates oi .the cas'ing. Centrally of, the'casing If) is acylindricahbore Irena, around thispoi e; the casing I has two pairsoi,cylinders I14, i 4; note r g-1 .5; ee ne-aim yi e el een being disposedat "right anglesitothe cylinders e cap I2has an admission port [6communicating with the bore 3 jfor introduction of fluidjto be filtered. cap alsojhasexpaust ports 11,11 communicating with .,an annularpassage I8 which isin communioationwith all of ehe;e i ee u ,4 1.5 .1.1-. .r eth r en i t cylinders 14, l4"'have ports I9, l3 and thecylinders l 5 -l5" have corresponding port-s, 20and these ports areadaptedto register either with one bipass passage 2 l in a rotatingvalvej'22', or with two dischar ge *passages 23 2 3- in the valve 22 thepassages 2 3; 2 3' hav'ing hollow discharges,

Applicatioifispteinher 7, 1950, Serial No. 133,553

(olf'zioics) as at 24, 24' into an annular discharge chamber 25 in the'cap l2, the annular discharge chamber 25'having an outlet526, aslnotedin Fig. L1. Air-.21 I have diagrammatically shown. an exhaust pipe withapressure regulating valve .28 therein, .0011: trolling the dischargefrom the chamber 25. g.;, The valve 22 has a stem.29.rotatable.in thecap: 12 or in a packing gland insaidtcap... Fixed to the outer end ofthe stem. 29. is. anioperating lever 3i whichmaybe-rnanually orotherwise opperated f or movement of the w valve intodifferentp'ositionsw In Fig.- 1 of the drawing, the valve 22 is shown with thebi-pass passage 2 lregistering with the apertures 19, I9. '11; thispo'sition of the valve, the ports 23, 23- will register with theapertures 20, 2Gas willappear;froma; consideration-of Fig. 2. Howeverybyrotating the va1ve 22 90; the passage 2 I canJbe brought-- intoregistering position withthe apertures 20,20, thus bringingthe'apertures 23, 23' in registering position-with the apertures I9 I92In this last positionf th'e cylinders le |4 will be in'acleaning-position, rather" than in the filtering position, as seen inPie 1- r .i .7 m 5' The cylinders 14, I4 l5, l 5' have, at theirendsadjacentthecap ,l I, enlarged seats as, for exam .1 a 3; ffor r v r n ofi te el m nt' generally identified by the reierence character all ofthese elements are of the same construction, the brief description orone willapply to 'all and distinctionlot'the elements will becharacterized bythe different cylinders which -f i nti e 7 In Fig. 1 ofthe drawing, the element 33 in the cylinder ldiis' 'shown in sectionand, from this showing, it wil1'appearfthat the" element oomprise anelongated .substantially .thirnbleeshaped ea 5 ha n mn ar e fl n e, end35. ting ,.snugly in the seat 32 -the enlargement 35 having anannulargroove 36 forniing a seat for one end'of a tubular fi1t er'31,fa packingbeing preferably'employ'ed. at the b'ottolirr o f the groove 35, as"indicatedat The .otherfc lo s ed end 39 of th filt'er casing 34 has areeep 3 .1 a ew Q l?a" empl ed. 3 6 3 11; 3 flan es k SHf i Pee Q fvlheeere ne 4 B weenfi e Q s eand herd jfl i shama s. and this disc A2forms anotherggroove seat. 44 for the other .end of the. filter. 3T..Thewallsofi the filterrcasing have longitudinallyand-circumferentiallyspacedelongated openings 45 subdi vided by ifineribs 46', thus exposing the major portion ofthe filter casing forggcirculatiqnjfof fluid therethrough and through the filter 31. Itwill appear that the disc 42 terminates short of the end of thecylinders I4, I4; I5, I5 adjacent the apertures I9, I9; 20, thusproviding free circulation of fluid therearound, the disc beingbevelled, as seen at 41, to facilitate this circulation.

The filter 31 which may be termed the filter element proper is formedfrom a coil spring, wherein each coil has a series of circumferentiallyspaced flats, as indicated clearly at 48 in Fig. 4 of the drawing, theseflats being formed by shaping the coil over a mandrel and where thebends 49 are located between each flat, these bends produce lateralenlargements, as indicated at 50 in Fig. 1 of the drawing. Normally,these enlargements of adjacent windings of the coil spring aresubstantially in the position diagrammatically illustrated in Fig. 5 ofthe drawing,

thus producing on the spring a spiral arrangement of the enlargements50.

In Fig. 5 of the drawing, the windings are shown in what may be termed anormal relationship, that is to say, when the flats 48 are in closestproximity to each other. However, the filterelement 31 can be so made asto lengthen in its fit between the recesses 36 and 44 so as to requireslight rotation of the spring, causing the projections 50 to ride oneupon the other, thus increasing, clearance at El between the flats 48 toadapt a single filter to varied uses, insofar as degree of filterizationis concerned. This control can also be provided by varying the number offlats in each winding of the element 31 and by the size andcross-sectional contour of the wire. Generally speaking, round wire ispreferred as a substantially line contact or control is thus providedbetweenthe adjacent windings which facilitates passage of the fluidthrough the coil in the filtering position, as well as the self-cleaningposition. 7

In the use of the device, fluid is circulated through the device byadmission into the cylinders I4, I4"'from the bore I3, passage 2! andports I9, I9. The-fluid then passes through the filter 31 in' thecylinders I4, I4, then into the annular passage or chamber I8 and outthrough the exhaust II, II for supply to the apparatus. In the earlystages, the fluid entering the passage I8 will also pass into thecylinders I5, I5 but will not be discharged therefrom due to'suitablecontrol governed by the pressure regulating valve 28. As and when thefilter elements 3'! of the cylinders I4, I4 become congested, and thismay be regulated by predetermined timing, the valve 22 is rotated tobring the passage 2I into registering position with the cylinders I5, I5which automatically brings the passages 23, 23' in registering positionwith the ports I9, I9. In this position, filtering will take place bypassage of the fluid through the elements 33 in the cylinders I5, I5 andthe fluid will be circulated through the elements 33 in the cylindersI4, I4 in the reverse direction, thus cleaning the filter 31 andexhausting the filtered fluid out through pipe ZIand valve 28.

In due time, the above operation will be repeated and filtering willagain take place in the cylinders I4, I4 by again shifting th valve 22back to the position shown in Fig. 1. It will be apparent that theshowing in Fig. 5 of the drawing is exaggerated for sake of clarity,particularly in illustrating a slight clearance, as at 5|. In actualpractice and with certain types of fllters, the clearance, as at 5|,would hardly be noticeable to the eye.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. A fluid filter of the character described, comprising a casing havingtwo pairs of opposed cylinders therein, end plates on said casing, oneplate having an annular chamber communicating with all of saidcylinders, said plate having means for discharging fluid from saidchamber, said plate having an intake port, the casing having a passagecommunicating with said port and opening through the opposed end of thecasing, a valve rotatably mounted in the other plate and having apassage communicating with the passage of said casing, said cylindershaving ports controlled by said valve, said passage of the valve beingadapted to be brought into registering position with the last namedports of opposed cylinders, the second named plate having a dischargechamber with discharge means communicating therewith, said valve havinga pair of ports adapted to be brought into registering position with theports of opposed cylinders to place said cylinders in communication withthe discharge chamber of said second named plate, means externally ofthe second named plate for actuating said valve, and filter elementssupported in each of said cylinders.

2. A fluid fllter of the character described, comprising a casing havingtwo pairs of opposed cylinders therein, end plates on said casing, oneplate having an annular chamber communicating With all of saidcylinders, said plate having means for discharging fluid from saidchamber, said plate having an intake port, the casing having a passagecommunicating with said port and opening through the opposed end of thecasing, a valve rotatably mounted in the other plate and having apassage communicating with the passage of said casing, said cylindershaving ports controlled by said valve, said passage of the valve beingadapted to be brought into registering position withrthe last namedports of opposed cylinders, the second named plate having a dischargechamber with discharge means communicating therewith, said valve havinga pair of ports adapted to be brought into registering position with theports of opposed cylinders to place said cylinders in communication withthe discharge chamber of said second named plate, means externally ofthe second named plate for actuating said valve, filter elementssupported in each of said cylinders, each of said filter elementscomprising an openwork elongated thimbleshaped casing, and a coiledfilter enveloping the openwork portion of said filter casing.

3. A fluid filter of the character described, comprising a casing havingtwo pairs of opposed cylinders therein, end plates on said casing, oneplate having an annular chamber communicating with all of saidcylinders, said plate, having means for discharging fluid from saidchamber, said plate having an intake port, the casing having a passagecommunicating with said port and opening through the opposed end of thecasing, a valve rotatably mounted in the other plate and having apassage communicating with the passage of said casing, said cylindershaving ports controlled by said valve, said passage of the valve beingadapted to be brought into registering position with the last namedports of opposed cylinders, the second named plate having a dischargechamber with discharge means communicating therewith, said valve havinga pair of ports adapted to be brought into registering position with theports of opposed cylinders to place said cylinders in communication withthe discharge chamber of said second named plate, means externally ofthe second named plate for actuating said valve, filter elementssupported in each of said cylinders, each of said filter elementscomprising an openwork elongated thimble-shaped casing, a coiled filterenveloping the openwork portion of said filter casing, and each windingof the coil filter including a plurality of circumferentially spacedflat sections.

4. A fluid filter of the character described, comprising a casing havingtwo pairs of opposed cylinders therein, end plates on said casing, oneplate having an annular chamber communicating with all of saidcylinders, said plate having means for discharging fluid from saidchamber, said plate having an intake port, the casing having a passagecommunicating with said port and opening through the opposed end of thecasing, a valve rotatably mounted in the other plate and having apassage communicating with the passage of said casing, said cylindershaving ports controlled by said valve, said passage of the valve beingadapted to be brought into registering position with the last namedports of opposed cylinders, the second named plate having a dischargechamber with discharge means communicating therewith, said valve havinga pair of ports adapted to be brought into registering position with theports of opposed cylinders to place said cylinders in communication withthe discharge chamber of said second named plate, means externally ofthe second named plate for actuating said valve, filterelementssupported in each of said cylinders, each of said filter elementcomprising an openwork elongated thimble-shaped casing, a coiled filterenveloping the openwork portion of said filter casing, each Winding ofthe coil filter including a plurality of circumferentially spaced flatsections, and said fiat sections being joined by laterally extendingenlarged portions.

5. A filter device of the character described, comprising a casinghaving pairs of opposed cylinders therein, filter elements arranged insaid cylinders, means centrally of the casing and opening through oneend thereof for introducing a fluid into the casing for admission intoopposed cylinders at the other end of the casing for passage throughsaid filters, means at said end of the casing for discharging thefiltered fluid therefrom, a rotatable valve at the other end portion ofthe casing controlling transmission of fluid into a pair of opposedcylinders and simultaneous discharge of fluid from other opposedcylinders from the second named end of the casing, and a pressureregulating valve controlling said last named discharge.

6. A fluid filter comprising a casing, end plates closing the ends ofsaid casing, the casing having a central bore, two pairs of opposedcylinders in the casing around said bore, one end plate having anannular chamber communicating with all of the cylinders and an admissionport communicat- 6 ing with one end of said bore, a valve rotatablymounted in the other end plate, the end of the cylinders adjacent thevalve having ports, said valve having a transverse passage adapted toregister with the ports of opposed cylinders and said bore, said valvealso having a pair of passages adapted to register with ports of opposedcylinders, the second named plate having an annular chamber arrangedoutwardly of said valve,

, the last named passages of said Valve communicating with the annularchamber of said second named end plate, a valve control outlet to thechamber of said second named end plate, and filter elements arranged ineach of said cylinders and directly communicating with the annularchamber of the first named end plate.

7. A fluid filter comprising a casing, end plates closing the ends ofsaid casing, the casing having a central bore, two pairs of opposedcylinders in the casing around said bore, one end plate having anannular chamber communicating with all of the cylinders and an admissionport communicating with one end of said bore, a valve rotatably mountedin the other end plate, the end of the cylinders adjacent the valvehaving ports, said valve having a transverse passage adapted to registerwith the ports of opposed cylinders of said bore, said valve also havinga pair of passages adapted to register with ports of opposed cylinders,the second named plate having an annular chamber arranged outwardly ofsaid valve, the last named passages of said valve communicating with theannular chamber of said second named end plate, a valve control outletto the chamber of said second named end plate, filter elements arrangedin each of said cylinders and directly communicating With the annularchamber of the first named end plate, and said filter elements beingdetachable with respect to the cylinders of the casing upon removal ofsaid first named end plate.

CHARLES M. TURSKY.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 516,140 Weir Mar. 6, 1894 844,438 Bayley Feb. 19, 1907 930,401Monteagle Aug. 10, 1909 1,784,103 Lowen Dec. 9, 1930 2,007,780 WardleJuly 9, 1935 2,008,598 Seeley July 16, 1935 2,081,198 Hahn May 25, 19372,100,266 Perry Nov. 23, 1937 2,342,669 Hoffman Feb. 29, 1944 2,347,927Paterson et al. May 2, 1944 2,423,172 Booth July 1, 1947 2,468,603 PewApr. 26, 1949 FOREIGN PATENTS Number Country Date 520,298 Great BritainApr. 19, 1940 583,639 Germany Sept. 7, 1933

